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AS3658F-BCTP Datasheet(PDF) 108 Page - ams AG

Part # AS3658F-BCTP
Description  Power and Audio Management Unit for Portable Devices
PDF  158 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3658F-BCTP Datasheet(HTML) 108 Page - ams AG

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www.austriamicrosystems.com
Revision 1v13
107 - 157
AS3658
Data Sheet Confidential - Detail ed Descri ption- Audio Functi ons
Register Description
Table 111. MIC_R Register
Addr:87
MIC_R
Right Microphone Input Register
Configures the gain from microphone amplifier output
Bit
Bit Name
Default
Access
Description
4:0
mr_vol
00000b
R/W
volume settings for right microphone input, adjustable
in 32 steps @ 1.5dB; gain from microphone amplifier
00000
-40.5 dB gain
00001
-39 dB gain
.....
11110
4.5 dB gain
11111
6 dB gain
6:5
pre_gain
00
R/W
Sets the gain of the microphone preamplifier
00
gain set to 28 dB
01
gain set to 34 dB
10
gain set to 40 dB
11
reserved, do not use
7
mic_agc_off
0
R/W
Control of limiter AGC (automatic gain control). Limits
high dynamic range of electret/MEMS microphone
(e.g. user shouts or blows into microphone)
0
automatic gain control enabled
1
automatic gain control disabled
Table 112. MIC_L Register
Addr:88
MIC_L
Left Microphone Input Register
Configures the gain from microphone amplifier output
Bit
Bit Name
Default
Access
Description
4:0
ml_vol
00000
R/W
volume settings for left microphone input, adjustable in 32
steps @ 1.5dB; gain from microphone amplifier
00000
-40.5 dB gain
00001
-39 dB gain
.....
11110
4.5 dB gain
11111
6 dB gain
5
rdet_off
0
R/W
Disables the microphone detect function (30k
Ω pull-up
from MICS to VDAC) to use the terminal as ADC-10
input
0
microphone detection enabled
1
microphone detection disabled
6
mute_off
0
R/W
Control of MUTE
0
microphone input set to mute
1
gain set to 34 dB



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